package com.project.myPackage.common;

import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.stereotype.Component;
import java.time.LocalDateTime;

/**
 * 自定义元数据对象处理器
 */
@Component//让spring管理
@Slf4j
public class MyMetaObjecthandler implements MetaObjectHandler {
    /**
     * 插入操作，自动填充
     * @param metaObject
     */
    @Override
    public void insertFill(MetaObject metaObject) {
        log.info("公共字段自动填充[insert]...");
        log.info(metaObject.toString());

//        metaObject.setValue("createTime", LocalDateTime.now());
//        metaObject.setValue("updateTime",LocalDateTime.now());
//        metaObject.setValue("createUser",BaseContext.getCurrentId());
//        metaObject.setValue("updateUser",BaseContext.getCurrentId());

        //记得设置字段类型为LocalDateTime,要不然会显示created_at 是null
        if(metaObject.hasGetter("created_at")){
            this.strictInsertFill(metaObject, "created_at", LocalDateTime.class, LocalDateTime.now());
        }
        if(metaObject.hasGetter("updated_at")){
            this.strictInsertFill(metaObject, "updated_at", LocalDateTime.class, LocalDateTime.now());
        }
    }

    /**
     * 更新操作，自动填充
     * @param metaObject
     */
    @Override
    public void updateFill(MetaObject metaObject) {
        log.info("公共字段自动填充[update]...");
        log.info(metaObject.toString());

        long id = Thread.currentThread().getId();
        log.info("线程id为：{}",id);

//        metaObject.setValue("updateTime",LocalDateTime.now());
//        metaObject.setValue("updateUser",BaseContext.getCurrentId());

        // 检查是否存在 updated_at 字段
        if (metaObject.hasGetter("updated_at")) {
            this.strictUpdateFill(metaObject, "updated_at", LocalDateTime.class, LocalDateTime.now());
        }
    }
}
